Buffer Memory Details; Module Status Area (Address: 0 To 11); Network Connection Status Area (Address: 28 To 69) - Mitsubishi Electric MELSEC Q Series User Manual

3 SPECIFICATIONS

3.8 Buffer memory details

3.8.1 Module status area (Address: 0 to 11)

3.8.2 Network connection status area (Address: 28 to 69)

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This section explains the buffer memory details.
POINT
(1) The value stored into the buffer memory is cleared when the programmable
controller is powered off and then on, or the CPU module is reset.
Normally, this area need not be read.
Read as necessary when maintenance is performed.
(2) When a value of 65536 or more is stored in the area consisting of one word, a
count is stopped at FFFF
(3) If a value of more than two words is stored in the area consisting of two words, a
count is stopped at FFFFFFFF
The Web server module LED ON/OFF status, intelligent function module switch setting
status, battery status, etc. can be confirmed.
Refer to corresponding sections in Section 3.7.
The connection status of the Web server module to the network can be confirmed.
(1) Router external IP address (Address: 28 to 29)
When the Web server module connects to the Internet after selection of "Notify
the global IP address obtained from the router" in the address notification setting,
this area stores the global IP address assigned to the router.
(2) Connection error code (Address: 30)
(a) The error code output at the time of network connection processing.
Refer to Section 9.3 for the error code.
(b) The connection error code is stored in binary when Connection error (X19)
turns on.
(c) The connection error code is cleared when:
1) The network is connected normally by making reconnection (Network
connection status (X4) turns on); or
2) The programmable controller is powered off and then on or the CPU
module is reset.
(3) Number of successful connection (Address: 31), number of failed
connection (Address: 32)
This area stores the cumulative numbers of successful/failed network connection.
(4) Number of connection tries by request signal (Y5) (Address: 33)
This area stores the cumulative number of attempted connection to the network
by Network connection request (Y5).
(65535).
H
(4294967295).
H
MELSEC-Q
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